Simplest way to create a database symbol
create a single piece out of a cylinder.

To make the edges less sharp read this question:

Weird deformation between large ngon and edge ring





Add an array modifier, and move the relative offset values for the Z axis like this.





Add a mix of glossy and anisotropic shaders.





EDIT Want an even simpler way?

Add a Curve->Circle.





Make it a 2D curve, fill in on both sides, give it some extrusion and bevel:





Add the array modifier, and texture.

For Info on how light a shiny object read this: Make a gold reflective object